ἐνδεξιᾷ

From LSJ

ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)

Source

Spanish (DGE)

adv. a la derecha Hdn.Gr.2.506, EM 338.43G.